SELF-INTERFERENCE CANCELLATION USING DIGITAL FILTER AND AUXILIARY RECEIVER
First Claim
1. A method for self-interference cancellation comprising:
- enabling a radio frequency (RF) receive filter for a victim band from a plurality of RF receive filters in a receive path, wherein each of the plurality of RF receive filters is for a unique band, and wherein said enabling is done prior to downconverting an RF signal in the receive path;
measuring an RF filter characteristic of the enabled RF receive filter with an auxiliary receiver;
configuring a programmable digital filter to match a filter characteristic to the measured RF filter characteristic to yield a reference signal; and
providing the reference signal to the receive path for interference cancellation.
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Accused Products
Abstract
Aspects of the disclosure are directed to interference cancellation. A method of performing interference cancellation in a wireless device having a transmitter and a receiver includes enabling a radio frequency (RF) receive filter for a victim band from a plurality of RF receive filters in a receive path; measuring an RF filter characteristic of the enabled RF receive filter with an auxiliary receiver; configuring a programmable digital filter to match a filter characteristic to the measured RF filter characteristic to yield a reference signal; and providing the reference signal to the receive path for interference cancellation; and, the reference signal is subtracted from a receive signal in the receive path.
34 Citations
30 Claims
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1. A method for self-interference cancellation comprising:
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enabling a radio frequency (RF) receive filter for a victim band from a plurality of RF receive filters in a receive path, wherein each of the plurality of RF receive filters is for a unique band, and wherein said enabling is done prior to downconverting an RF signal in the receive path; measuring an RF filter characteristic of the enabled RF receive filter with an auxiliary receiver; configuring a programmable digital filter to match a filter characteristic to the measured RF filter characteristic to yield a reference signal; and providing the reference signal to the receive path for interference cancellation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for self-interference cancellation comprising:
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an enabling device to enable a radio frequency (RF) receive filter for a victim band from a plurality of RF receive filters in a receive path, wherein each of the plurality of RF receive filters is for a unique band; a mixer to downconvert an RF signal in the receive path, wherein said enabling device operates prior to downconverting said RF signal in the receive path; a filter to measure an RF filter characteristic of the enabled RF receive filter; a processor to configure a programmable digital filter to match a filter characteristic to the measured RF filter characteristic to yield a reference signal from the programmable digital filter; and a summer coupled to the programmable digital filter to provide the reference signal to the receive path for interference cancellation. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus for cancelling interference, comprising:
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means for storing a plurality of victim bands, the means for storing coupled to at least one processor; means for enabling a radio frequency (RF) receive filter for one of the plurality of victim bands from a plurality of RF receive filters in a receive path, wherein each of the plurality of RF receive filters is for a unique band and wherein said enabling is done prior to downconverting an RF signal in the receive path; means for measuring an RF filter characteristic of the enabled RF receive filter; means for configuring a programmable digital filter to match a filter characteristic to the measured RF filter characteristic to yield a reference signal; and means for providing the reference signal through a summer to the receive path for interference cancellation. - View Dependent Claims (29)
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30. A non-transitory computer-readable storage medium storing computer executable code, operable on a device comprising at least one processor;
- a memory for storing a plurality of victim bands, the memory coupled to the at least one processor; and
the computer executable code comprising;instructions for causing the at least one processor to enable a radio frequency (RF) receive filter for one of the plurality of victim bands from a plurality of RF receive filters in a receive path, wherein each of the plurality of RF receive filters is for a unique band and wherein said enabling is done prior to downconverting an RF signal in the receive path; instructions for causing the at least one processor to measure an RF filter characteristic of the enabled RF receive filter; instructions for causing the at least one processor to configure a programmable digital filter to match a filter characteristic to the measured RF filter characteristic to yield a reference signal; and instructions for causing the at least one processor to provide the reference signal through a summer to the receive path for interference cancellation.
- a memory for storing a plurality of victim bands, the memory coupled to the at least one processor; and
Specification